Tác phẩm này thuộc về phạm vi công cộng ở Hoa Kỳ vì nó được phát hành trước ngày 1 tháng 1 năm 1929.
Tác phẩm thuộc phạm vi công cộng phải hết hạn bản quyền ở cả Hoa Kỳ lẫn quốc gia gốc của tác phẩm thì mới có thể lưu trữ tại Commons. Nếu tác phẩm không phải của Hoa Kỳ, tập tin phải có một thẻ bản quyền nữa để ghi rõ tình trạng bản quyền của quốc gia gốc. PD-1923Phạm vi công cộng tại Hoa Kỳ//commons.wikimedia.org/wiki/File:Parnall_Scout.jpg
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This UK artistic or literary work, of which the author is unknown and cannot be ascertained by reasonable enquiry, is in the public domain because it is one of the following:
A photograph, which has never previously been made available to the public (e.g. by publication or display at an exhibition) and which was taken more than 70 years ago (before 1 January 1954); or
A photograph, which was made available to the public (e.g. by publication or display at an exhibition) more than 70 years ago (before 1 January 1954); or
An artistic work other than a photograph (e.g. a painting), or a literary work, which was made available to the public (e.g. by publication or display at an exhibition) more than 70 years ago (before 1 January 1954).
This tag can be used only when the author cannot be ascertained by reasonable enquiry. If you wish to rely on it, please specify in the image description the research you have carried out to find who the author was. The above is all subject to any overriding publication right which may exist. In practice, publication right will often override the first of the bullet points listed.
Unpublished anonymous paintings remain in copyright until at least 1 January 2040. This tag does not apply to engravings or musical works. More information
A mail were sent to the webmaster, who isn't anymore in touch with Alan Webb, who submited the original article to the Bristol Aviation web-site. He explained: « I believe he obtained the original from the archives of the Parnall company when they were kept on the factory site at Yate in South Gloucestershire. Parnall stopped making aircraft after the second world war and the factory is now a main source of domestic tumble-dryers. I will try to find out something from the local history society in that area, but I am not confident of success. ».
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